Frank kraemer



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DEVISE FOR -T'HWINlzu EARTH FR PLACER MINING (Application led Sept. 7, 1897,)

(No Model.)

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UNITED STATES PATENT OFFICE.

FRANK KRAEMER, OF CHICAGO, ILLINOIS, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO ADOLPH BLOCH AND SOL KURZ, OF SAME PLACE.

DEVICE FOR THAWING EARTH FOR PLACER-MINING.

SPECIFICATION forming part of Letters Patent No. 614,227, dated November 15, 1898.

Application filed September 7, 1897l Serial No. 650.783. (No model.)

To all whom it may concern.-

Be it known that I, FRANK KEAEMER, a citi- Zen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Imrovements in Devices for Thawing Earth for lacer-Mining; and I do hereby declare the following to beafull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a novel construction in a device for thawing earth for placermining or other purposes, the object being to provide a device of this description of simple and durable construction and efficient operation; and it consists in the features of construction and combinations of parts hereinafter fully described and claimed.

In the accompanying drawings, illustrating my invention, Figure 1 is a longitudinal section of a heater constructed in accordance with my invention on the line 1 1 of Fig. 2.

Fig. 2 is an end elevation' of the same. Fig. 3 is a transverse section of the same on the line 3 3 of Fig. 1.

My device consists of an outer cylinder A, provided at one end with a perforated head B, upon which a plate C is pivotally mounted, which has perforations corresponding with said perforations in said head B, thus forming a valve for opening and closing said perforations; Concentrically mounted within said cylinder A by means of spokes 1 is a smaller and shorter chamber 2, having two concentric walls, so as to leave an opening 3 through the center thereof. The innermost wall of said chamber 2 converges toward said outer wall at its rear end, thus forming a fiaring mouth 4, which contracts to form said opening 3. Said cylinder A and chamber 2 are flush at their forward ends, and the ringshaped space between the same is closed at its mouth by means of a section 5 of wirecloth, which is adapted to prevent the entrance of dirt. A pipe 6, provided with a valve 7, passes through saidcylinder A and enters said chamber 2, connecting the latter with an oil-tank (not shown) by means of a flexible tube 8. Pipes 9 and 10, entering the rear end of said chamber 2 at diametrically opposite points, connect the latter with a burner 11, mounted in said head B and closed at its outer end by a cap 12, by means of the pipes 13, which enter said burner 1] at diametrically opposite points. A burner .14 is mounted in said opening 3, which is controlled by means of a Valve 15, the stem of which passes through said cylinder A. Saidvalve 15 is situated out of the path of the iiame thrown by said burner 11 and is fed from the pipes 9 and l0 by means of the connectingpipes 16.

The burner 14 is provided with an enlarged end or head, as shown in Fig. 1, the sides of the saidhead converging toward the outer end of the burner. The enlarged head is hollow in its interior, and thus as the vapor is generated in the burner 14 the enlarged head forms a cavity for the reception of such vapor and the vapor is expelled with great force at the end of the burner.

A piece 17 of asbestos is secured in the cylinder A at a point which will be in vertical alinement with the burner 11 when said device is held in the position in which it will be started into operation and is adapted to receive oil allowed to drip from said burner 11. When said valve 7 is opened, the chamber 2 will ll with oil, which will flow through the pipes 9 and 10 to the burner 11 and thence drip upon the asbestos, which will absorb it and upon which it can be ignited. The

,iame produced will obviously heat the oil in the pipes 9 and 10 and cylinder 2,`and thus generate vapor, which as it iows from said.'

burner will be ignited, and this liame will impinge against the burner 14 and the inner wall of the chamber 2, thus heating the lat-- IOO said valve the supply of vapor to the burner 1l may be regulated, and thus the intensity of the llame coming from the burner may be correspondingly regulated. The valve 15 being located out of the path of the llame of the burner 1l the said valve is not subjected to the intense heat incidental to such flame. The inner end of the oil-chamber being flared the heat contained wit-hin the cylinder A is led through the opening of the chamber. The said opening, gradually decreasing in dimension, compresses the flame and it is expelled at the outer end of the chamber with great force.

I claim as my invention-- 1. A heater of the kind specified consisting of an outer cylinder, an oil-chamber concentrically mounted within said cylinder, said oil-chamber having a central opening, an oilsupplypipe connected with said oil-chamber, a burner located within the cylinder and rearwardly of the oil-chamber, pipes located within the cylinder and connecting the oilchamber with the said burner, a burner located within the central opening of the oilchamber, pipes connecting the last said burner with the oil-chamber, avalve located beyond the inner end of the oil-chamber and adapted to control the supply of oil from the last said pipes to the burner located within the opening of the oil-chamber.

2. A heater of the kind speciiied consisting of an outer cylinder, an oil-cliamberconcentrically mounted Within said cylinder, said oil-chamber having a central opening, an oilsu pply pipe connected with the oil-chamber, a burner located Within the cylinder, rearwardly of the oilchamber, pipes located Within the cylinder and connecting the oilchambcr with the said burner, a burner located within the central opening of the oilchamber, pipes connecting the last said burner with the oil-chamber, a Valve eccentrically located within the cylinder between the inner end of the oil-chamber and the rear burner, said valve adapted to control the supply of oil from the last said pipes to the burner located within the opening of the oilchamber.

In testimony whereof l aliix my signature in presence of two witnesses.

FRANK KRAEMER.

Witnesses:

ERWIN J. LoTz, WM. II. BENNETT. 

